Carburetor



Nov. 3, 1931. c. H. CLAUDEL 1,829,786

I CARBURETOR Filed April e. 1927 2v sheets-sheet 1 Nov. 3, 1931. c. H. CLAUDEL 1,829,785

CARBURETOR Filed April e, 1927 2 sheets-sheet 2 2Q, O Z

i Patented Nov. 3,y 1931 Veiielnmis riminiV CLAUDEL, or VEUXHAULLES, FRANCE CARBURETOR ApplicationI led April .6,l 1927, Serial No. 181,471, and in France December 24, 1926.

The invention relatesrto carburetors of the type in which thefthrottling element of the induction passage 'ofthe' cylinder towards the motorV comprises a@ rotary oscillating i plug, controlling at the'sametime the admission of the carbureted mixture to the motor and the depression upon the spray nozzle,

by thedown-stream section and'by the relati-onbetween the downstream and upstreaml sections respectively. The inventionrelates v more particularly withrmultiple nozzles.

llnthese carburetors the slowspeed spray orj et nozzle is subjected to the variations of v thel depressions prevailingat the yinside of the rotary plug, while the spray or jetnozzle ofthe full speed mixture is arranged outside of the rotary plug atY the upstream side of the section controlling the depression at the interior of the rotary plug. I This usual disposition `however is defective, because the mainy spray nozzle, being-placed at the outside of vthe rotary plug,v upon. opening the slide is subjected too late to the inductive depression;

intermediate betweenthe extreme slow speed and full speed willbe unsatisfactory.

One object of the inventionis toyrem'ove` y this inconvenience. Ay first feature consists 5370 therein that the full spee'dspray or jet nozzle as well as the slow speed spray or jet nozzle L Vare both subjected to the depression obtaining within the rotary plug; In this manner, y the curves indicating the outputfof the varied' ous nozzles in function of the openings of the plug, instead of beingbent in a reverse direction, and thereby causing for-the resulting curve of. the total output a break and the diiiculty of the passage point, arey allr running in the same direction; it is thusvan` easy mati ter tohave the resulting curve of the totalv output describe a continuous and progressive ypath according .to the desired law. Y vA further obj ect of the invention-is to provide a device for the regulators of multiple carburetors feeding certain types/of motors,

such as aeroplane motors.k j y l :The annexed .drawings illustrate as examplesxseveral embodiments of the appa- Vra'tiisaccordingto the invention. "Fig 1 Yplug 3 mounted within the bottom part of to carburetors of this type y ing takes place within the chamber 5 of the as a result restartingand operating at speedsy isy a vertical section, Fig. 2 a similar section of an apparatus morer particularly adapted for heavy fuels; Fig. 8 is a schematical view illustrating thev improvement as applied to y the correctorsof carburetors in motors 55 equipped with several carburetors.

The carburetor lillustrated in Fig. 1 com-l prises a float feed chamber 1, anda conduit 2 supplying the main spraying calibrated 60 the main diffusing element 4; the main sprayelement 4, in which, while operating normally, the air arriving through the conduit 7 of the oriiice 8, .enters through the orifices 6, said orifice 8 being adapted to be regulated by means ofy a screw 9 communicating with the outside by an orifice 10. Tfhe emulsion formed within the chamber 5 is iown through i the'tube 11 entering at 12 the Vport 13 of 70 the rotarythrottling plug 14; the tube 11 acts at the same time as protection preventing the fuel from flowing off after a stop. The diffusingelement comprises an outer tube 15 encircling the emulsion tube 11 and 75' vleaving a narrow free space between both tubes; the orifices 16 are regulated by a nut 17 adapted to regulate additional air intermixing with the emulsion upon its outflow through the orifices 12 provided within the tube 15 below the screw connected headv 18 ofthe nozzle. This head 1,8 carries, mounted upon its base portion, the slow speed diffusing closed tube 19. This closed tube is provided with one or several supply orifices 20 leading the fuel or the emulsion from the chamber 5, and with one or several upper orifices 21 wherethrough, during slow down operation, the air of the port of the throttling plug is allowed to enter theslow speed nozzle. The upper part of the head 18 carries a. flexible tube 22 for the slow speed mixture said mixture being mixed with air entering at 21 in the immediate vicinity of the little opened section from the port 13 towards the induction conduit 29 of the en- V24 shows a corrector for the regulation of the section of the admission of the main air; this 'device can be controlled in anyv appro- Inn 2o v duit 280i'reduceddiarneteris provided,` renut which is screwed upon the tube 15.f

A`slidef25 whereby to vary the section of the maintair inletcan also be provided, said slide being actuated by traction exerted upon a rod or cablej26 against the action o a rel i `turn yspring v27.

Y The vsl'ovv speed fnozzle, being subjected to the depression obtaining within the rotary slide by the uppercndfcf the Vflexible tube y 22, and the main spraying nozzle being like;

wise subjected to this depression by the or iices'v12,i t will -be seen that `the output of both vsprayingv nozzles gandthat of thecorresponding-spraying nozzles `vary in the saine way, (and. that anfy break inthe curve ofthe totalf'voutput, e., any irregularity at y.thepoint otpassage lwill beprevented. As illustrated, van auxiliary induction conceiving the.. carbureted slow speed'Y Ymixture withoutimpairing its speed of .flow within Ythe Yinduction conduit 29"to a point 30 situ-VV ated symmetrically between the t-wo branches y 29t 29'/ feedingthecylinder group; infthis vfari kto liquid fvesiclesfthat.mightotherwiseIbe` manner the slowspeedmixtlurelis evenly di vided between` these twogroups of cylinders ;V the wall of the maininduction conduit next to the outlet' '30 of the auxiliaryfconduit 2S is heated by a heating chamber 31; protrud-` ingwings 32preventfthe gaseousvein rcm flowinggalong thewall of kthe conduitsi-29i and V29? {and prevent in thismanner any trouble inthe operationof the cylinders due formed. a f

Fig. 2 illustrates ai further` embodiment of the .spraygnozzlesQ morefparticularly adapted Y for amotor using heavy fuels'. The genera-l dispositionis practically the same as that shown in Fig. 1 with `the exception that ai heating deviceas hereafter' described, is pro vided between the lower dii'using chamber f5 and lthe vupper vorifices feeding they emulsion tothe interior of the throttling plug. A helicoidal peripheralductor groove 34 upon la cylindricall bodyf35, .which V- latter .isV alsotraversedcentrally by the slowspeed dius'- ing tube 19, connects the chamberv 5to the upper. annular chamber 33 leading to the ori- ",ice's 12.v f Thehelicoidal duct 34V is closed exi eu.

ternallyby a thin metallic wall 3.6y enclosing the cylindrical ,body35; this wall is placed within a heating jacket 37 whichis preferably heated bythe exhaust-'gases arrivingthrougli the socketSS and-escaping through 38. Thek ducts 39,r connecting thev4 outlet of the `helicoidal` groove to the annular space33, enter this grooveat a certain distanceirom the external wall 36. Itwill be seen that with these dispositions the emulsion-vis centrifugated and'highly heated bythe ywall 36, and

that only the lightest, perfectlydiii'used parts vvcan escape through the ducts 3,9.. Y y l 4alirto'the'ori-V The admission of secondary ices 12 is preferably eii'ected by means of a conduit 16 and it is regulated by a suitable valve 17.

When the Yniotor is equippedv with several carburetors feeding a vnumber 'otcylinders,

such as in multiecylinder aeroplaneengine's, the con] ugated control oi" the4r correctors for the emulsionairiorlthe principal air tot kthe various carburetors engenders. complications shafts, etc. Thesefconnectionscomplicate thel structure? due mora-particularly to the variousA angles ofsdeviation' required toobtain a single control i lthe various transmission ,ele-i ,ments giving rise'tolostmotion,`arev subjected l py *Y to iluxions andvibrationsso that variations t at the outletorice 2,3, and flowing the saine lin the correction-willnecessarily occurberegular. All these Acomplications and inconveniences are absolutely-overcome by means of' the improvement described;hereafter.k lThis improvementconsists 1n assembling intol one single element aseries of-cocks with a single` n plug regulating in an absolutely precise and secure manner the various air admissions'for vthe several carburetors. F ig. 3 illustrates this -devicein-a schematical manner, A cock plug Y 40 with; control lever 41 is provided 4with Y various y.ports 42'-;42-42, etc.'. g which', in

cooperationwit'h the orifices of the .body of vthe cock 43,',regulate theadmission of the' air of correction flowingthroughy .preferably flexible tubes 4 4, '44,etcg tothe desired` point i of thev carburetors.l feeding the several groups of cylinders.v Itis Vwell understoodthat a multiple corrector of vthis type ,can be controlled by any appropriate means either manually or automaticallyj` fVarious dispositions 4of the severalconsti; tuting elements and changes in their yconstruc-k tion can be used without departing frornthe scope of the invention. ,Y y v.

"Claimszff Y' Vg f1 f V1.V A carburetor for an internal vcombustion engine provided with'an emulsierf'consistingrof concentric tubes formingftwo femul-T sion chambers, one for4 normal speed, andthe vother for slow speed and with a iiexibletubefor conductingtheslow speed emulsioniin the proximity ot'thefoutlet, ytowards the 'en-i gine, of ai throttling elementfot the plug type', comprising in combination fa y throttle` valve rotating around'an-a'xis perpendicular-to the Vlongitudinal direction otsaid-venrulsiiier andV an outletfof the normal speed emulsion cham-- ber vhaving an l invariable l section during' the isc rotation of saidvalveand opening into the i -j interior of saidvalve.

2. In a carburetor 'for an internal combustion engine vcomprising an oscillating 5 throttling'element of the plug type with a Y, passage therethrough, said element letting Y in itsslow speed position a little opened sectionV towards the engine, and further com- V prising a main difusing chamber with'feed- 1()y ing means for the fuel and for the primary Ylair, in combination a slow sped nozzle formed by a flexible tube which opens, for the slow *Y .ffl speed position of the throttling element-in f 1 the ,immediateV vicinity of the little opened 175 section towards the'engine, at least one tube connecting the' diffusing chamber to the pasf sagev through said throttling element so as t'o form main nozzle, and a helicoidal heated f groove between the emulsion chamber and 20,. the tube forming the main nozzle. y 4

In' a carburetor for an internal combustion engineL comprising an oscillating throttling element of the plug type with a passage therethrough, said element letting in 25 its slow speed position va little opened sectionjtowards the engine, andfurther comprising a main'diffusing chamber with feeding means for theifuel and for the primary air, in combination a slow speed nozzle v30 formed by la flexible tube which opens, for

the slow speed position of the throttling elei ment in the immediate vicinity of the little opened'seotion towardsrthe engine at least one tube connecting the diffusing chamber l :55,l to the passage through the said throttling element so, as torform main nozzle, and a helicoidal groove between the emulsion chamber and the tube forming the` main nozzle, a heat- Y ing jacket embracing said groove. 4Q In testimony whereof, I Vhave signed my name to this speoieation.

' CHARLES HENRICLAUDEL. 

